YJV22 0.6/1kV 3×240+1×120 Copper Steel Tape Armoured Power Cable | Heavy-Duty

The YJV22 0.6/1kV 3×240+1×120 is a high-capacity, low-voltage, three-phase four-wire steel-tape armored power cable designed for heavy-duty main power distribution systems. It features three 240mm² phase conductors to handle high rated three-phase operating currents and a 120mm² neutral conductor to balance phase loads and meet system grounding requirements. Its construction comprises compacted high-purity electrolytic copper conductors, extruded cross-linked polyethylene (XLPE) insulation, an inner bedding layer, double-layer overlapping galvanized steel-tape armor, and a weather-resistant PVC outer sheath; this design combines excellent electrical transmission performance, robust mechanical protection against damage, and exceptional adaptability to complex underground soil environments.

Unlike mid-sized 3×95+1×50 trunk cables, the 3×240+1×120 specification is frequently specified by electrical engineering firms for high-capacity power intake applications, including main power feeds for high-rise building complexes, primary power supplies for industrial plants, interconnections between box-type substations in large-scale photovoltaic farms, and municipal primary branch grid upgrades. Its integrated double-layer steel-tape armor allows for direct burial without the need for additional protective conduit, thereby effectively controlling overall civil engineering budgets while ensuring long-term operational safety and reliability. This model has become one of the most widely used large-cross-section armored cables in global infrastructure tenders.

• YJ: Cross-linked polyethylene (XLPE) insulation, featuring high dielectric strength, resistance to water-tree aging, and stable insulation characteristics under long-term heavy, fluctuating loads

• V: PVC inner bedding layer, serving to isolate the steel tape armor from the internal insulated core assembly and prevent friction and electrochemical corrosion

• 22: Double-layer galvanized steel tape armor + PVC outer sheath, forming a robust mechanical barrier against soil pressure, construction impacts, rock punctures, and rodent damage in direct-burial environments

• 0.6/1kV: Rated AC operating voltage (phase-to-ground/phase-to-phase), suitable for standard low-voltage industrial and civil three-phase power distribution

• 3×240+1×120: Three main phase conductors (240 mm² cross-section) + one neutral conductor (120 mm² cross-section); utilizes a standardized three-phase, four-wire high-capacity distribution layout, with the neutral conductor sized to handle the cumulative effects of harmonics and unbalanced currents

• GB/T 12706.1–4:2020 – National standards for extruded insulation power cables with rated voltages from 0.6/1 kV to 35 kV

• IEC 60502-1 & IEC 60502-2 – International standards for extruded insulation power cables (low and medium voltage)

• IEC 60228 – Standard for the construction of Class 2 compacted stranded copper conductors

• GB/T 19666 – Flame-retardant grade specifications (customizable ZA/ZB/ZC flame-retardant versions available for these large-cross-section specifications)

Comprehensive Certification System: Includes ISO9001 quality management system certification, CCC mandatory certification, CE certification, CB certification, full-item type test reports, raw material inspection documentation, and third-party independent test certificates; fully meets requirements for bid submission, technical review, and project completion acceptance audits in international tenders.

• Class 2 Compacted High-Purity Electrolytic Copper Conductors
  The three 240mm² phase conductors utilize a compacted stranding process to enhance roundness and density, thereby significantly reducing DC resistance, heat generation, and power loss during long-distance, heavy-load power transmission. The accompanying 120mm² neutral conductor is scientifically sized to handle three-phase unbalanced currents and circulating harmonic currents, effectively mitigating the risk of burnout due to overload caused by an undersized neutral cross-section. These copper conductors exhibit negligible creep deformation under sustained terminal crimping stress, ensuring stable contact resistance over a service life exceeding 30 years and effectively eliminating the line hazards commonly associated with aluminum conductor alternatives.

• Independent XLPE Insulation and Real-Time Online Eccentricity Monitoring
  Each conductor core features an independent extruded cross-linked polyethylene (XLPE) insulation layer, with a real-time wall-thickness deviation monitoring system employed during production to strictly control dimensional consistency. The XLPE material effectively resists hydrolysis, thermal degradation, and water-tree aging—phenomena often caused by prolonged burial in moist, acidic, or alkaline soil—ensuring the integrity and reliability of insulation performance even under continuous heavy-load operation and frequent peak-load fluctuations.

• Non-hygroscopic PP filler + integrated binding tape
  Fills the interstices of the cable core to maintain a consistently round profile for large-diameter cables; alleviates internal compression and friction during pulling, bending, and installation, preventing scratches to the insulation surface; and retards moisture ingress in semi-enclosed cable trenches or direct-burial environments.

• Extruded PVC inner bedding/separator sheath
  Forms a complete physical barrier between the steel tape armor and the insulated core assembly, preventing sheath abrasion during installation and bending; additionally, in corrosive soil environments, it isolates the galvanized steel tape from the internal copper conductors and insulation components, preventing electrochemical corrosion.

• Double-layer overlapping galvanized steel tape armor (primary mechanical protection layer)
  Utilizes a double-layer, counter-wound, overlapping steel tape structure to withstand the high lateral pressures encountered during the direct burial of large-cross-section backbone cables; effectively resists lateral soil pressure, accidental excavation impacts, punctures from sharp stones, and rodent damage. This structural design is the key factor enabling such high-capacity incoming backbone cables to be directly buried without the need for additional conduit protection.

• Weather-resistant PVC outer sheath
  The outer sheath provides comprehensive protection against soil chemical corrosion, UV degradation, ozone aging, and moisture ingress; suitable for overhead, cable trench, and tunnel installations, as well as various underground operating conditions, ensuring the cable maintains structural integrity throughout its designed service life.

• Rated Voltage Class
  U0/U: 0.6/1kV AC 50Hz; standard low-voltage distribution rating suitable for heavy-duty three-phase load incoming supply systems

• Fixed Conductor Configuration
  Main Phase Conductors: 3 cores × 240mm² (Class 2 compacted stranded high-purity copper conductors)
  Neutral Conductor: 1 core × 120mm² (Class 2 compacted stranded high-purity copper conductor)
  Core Arrangement: Symmetrical three-phase four-wire layout, optimized for unbalanced load operating conditions

• Thermal Performance Specifications
  Maximum permissible continuous operating temperature of the conductor: 90°C
  Maximum short-circuit withstand temperature of the conductor (duration ≤ 5 seconds): 250°C
  Minimum permissible ambient temperature for installation: 0°C for the standard version; low-temperature custom versions support installation in harsh environments down to -20°C
  Rated design service life under proper installation and normal operating conditions: ≥ 30 years

• Mandatory Installation Bending Radius Requirements (Critical inspection point for on-site installation of large-cross-section cables)
  Minimum bending radius for this multi-core YJV22 3×240+1×120 cable: ≥ 12 times the cable's outer diameter
  Structural Limitations: The armor layer can withstand radial pressure and impact loads but cannot withstand significant axial tensile force; for this type of heavy-duty backbone cable, long-span overhead suspension or installation methods involving high vertical drops and significant tension are not recommended.

• Electrical and Installation Characteristics
  Under standard direct-burial conditions, the calculated continuous current-carrying capacity meets the total incoming load requirements for large office complexes, plant-wide main power distribution systems, and medium-to-large photovoltaic power stations. The use of low-resistance copper conductors effectively controls voltage drop and active power loss during transmission over medium-to-long-distance trunk lines, preventing excessive voltage deviation from disrupting the normal operation of high-power terminal electrical equipment.

• The pre-configured 3×240+1×120 four-core specification eliminates the need for repetitive design calculations.
  This fixed combination of large cross-sections represents a mature industry standard suitable for high-capacity main power supply lines in buildings. Electrical design institutes do not need to separately calculate the matching ratio between phase conductor and neutral conductor cross-sections, thereby shortening the timelines for drawing reviews, scheme approvals, and technical consultations during the project bidding phase. Its standardized parameters—covering current-carrying capacity, voltage drop, and installation—are widely recognized by power authorities and third-party auditing bodies, reducing the risk of design changes.

• The integrated double-steel-tape armored design enables direct-burial installation for heavy-duty trunk lines, effectively reducing costs.
  The built-in mechanical protection layer eliminates the need for large-diameter HDPE/PVC protective conduits in underground service entry designs; this reduces the volume of civil works—such as trenching, conduit laying, backfilling, and compaction—simplifies on-site layout planning, and shortens the overall construction schedule for large-scale building service entries and municipal trunk line upgrades.

• Copper conductors ensure the long-term stability of critical power trunk line connections.
  Given that building service entry trunk lines must withstand fluctuations in the project's total peak load, the superior creep resistance of copper conductors prevents terminal loosening and temperature rise issues common with aluminum cables, thereby significantly reducing maintenance frequency and safety risks for permanent, critical power supply circuits after project handover.

• Flexible flame-retardant ratings compliant with domestic and international fire safety standards
  For the specific 3×240+1×120 specification, flame-retardant ratings of ZA, ZB, or ZC can be customized to meet regulatory requirements—such as those for basement incoming lines, underground utility tunnels, commercial complex trunk lines, and fire safety acceptance filings for large public building electrical systems.

• Optimized cross-sectional configuration to effectively control voltage drop in medium-to-long-distance trunk line transmission
  Utilizing a scientifically determined ratio of 240mm² (phase conductors) to 120mm² (neutral conductor), the design balances high current-carrying capacity with effective line loss control. It is ideally suited for medium-distance power transmission (150–500 meters) from municipal grid cabinets or box-type substations to building main distribution rooms, preventing excessive voltage deviation that could otherwise disrupt the startup and operation of high-power air conditioning systems, elevators, and industrial equipment.

• Adopting standard, mainstream, large-format specifications avoids the price premiums associated with custom manufacturing.
  These specifications represent mature, widely used, mainstream heavy-duty backbone sizes that benefit from continuous mass production; compared to non-standard custom cross-sections, they offer more stable unit prices and shorter lead times, enabling procurement teams to accurately lock in budget quotes during the bidding phase and mitigate the risk of cost fluctuations.

• The direct-burial approach reduces the overall expenditure on civil engineering works.
  By eliminating the procurement, transport, and installation of large-diameter casings from the direct-burial route design, this method directly lowers the civil engineering component of the total project cost, helping EPC contractors maintain healthier profit margins during the bidding and contract-award processes.

• Low long-term O&M costs offset the higher initial investment in copper materials.
  Although the initial unit price is higher than that of equivalent YJLV22 aluminum-core armored cables, the extremely low failure rate of joints and lines significantly reduces expenses for routine inspections, emergency repairs, and partial replacements over a 30-year service life, delivering outstanding overall economic benefits for large-scale permanent infrastructure projects.

• Ample stock reserves shorten order delivery times for large-scale, urgent projects.
  The YJV22 3×240+1×120 specification is a mainstream heavy-duty backbone cable with high market demand; consistent inventory levels support small-batch trial orders, urgent replenishment requests, and rapid bulk shipments, effectively preventing project delays caused by lengthy production cycles.

• Highly versatile, standardized large-scale accessories reduce costs associated with fragmented procurement and management.
  Matching heavy-duty cable terminals, junction boxes, wall-penetration seals, and cable glands utilize universal standard sizes, eliminating the need for custom-made accessories; this simplifies workflows for project material departments regarding bill-of-materials (BOM) management, incoming inspections, and warehousing.

• Main feeder cables connecting municipal outdoor box-type transformers or grid distribution cabinets to the central distribution rooms of large commercial complexes, high-rise office buildings, hospitals, major shopping malls, and industrial parks.

• Heavy-load, three-phase four-wire main distribution feeders within industrial parks, connecting substation output cabinets to the plant's main switchgear and powering heavy-duty equipment used in continuous production processes.

• Direct-buried cables interconnecting box-type transformers in large-scale centralized ground-mounted photovoltaic (PV) power plants, as well as auxiliary power lines for wind farm step-up substations.

• Direct-buried main power lines for municipal grid renovation projects, replacing aging large-cross-section overhead conductors and obsolete direct-buried aluminum-core cables.

• Power supply cables laid along urban arterial roads, bridges, and municipal tunnels, requiring resilience against risks such as external mechanical impact, crushing, and damage from construction excavation.

• Medium-to-heavy-duty main distribution cables fixedly installed in underground utility tunnels, long-distance tunnels, and large cable trenches, subject to mandatory requirements for protection against mechanical damage.

• Auxiliary main power supply cables for centralized distribution systems in the basements and underground parking garages of large commercial buildings, as well as centralized power input systems for multi-unit residential complexes.

• Comprehensive Calculation of Load and Voltage Drop Prior to Final Selection
  Before finalizing the choice of YJV22 3×240+1×120 cable, it is essential to calculate the total peak load, verify current-carrying capacity, and compute voltage drop over the actual transmission distance. Our technical team offers complimentary, customized current-carrying capacity charts and selection analysis reports to prevent wasted investment from oversizing or long-term operational risks caused by insufficient capacity.

• Standardized Requirements for Crimping Heavy-Duty Copper Terminals
  Installation requires the use of matching heavy-duty copper terminals (240mm² for phase conductors, 120mm² for the neutral conductor). Crimping pressure and compression depth must be strictly controlled in accordance with electrical installation standards to prevent poor contact or abnormal temperature rise at the joints resulting from improper crimping. As copper-to-copper connections do not require transition fittings, on-site installation is simpler compared to aluminum-core cable terminations.

• Strict Control of Bending Radius During Large-Cross-Section Cable Pulling and Laying
  Throughout the laying process, the requirement that the bending radius must be no less than 12 times the cable's outer diameter must be strictly observed. Sharp right-angle bends or forced bending are strictly prohibited to prevent thinning or cracking of the internal insulation layer and to avoid the risk of dielectric breakdown during long-term operation. Protective chamfered sleeves and anti-abrasion pads must be installed at conduit openings to prevent damage to the outer sheath of heavy, large-diameter cables during the conduit-pulling operation.

• Mandatory Requirement for Reliable Grounding of Steel-Tape Armor at Both Ends
  Reliable grounding must be implemented at both the starting and terminating ends of double-layer steel-tape armored cables in accordance with local electrical codes; this prevents the accumulation of induced voltage within the metal armor layer and eliminates potential electrical safety hazards associated with long-term underground operation.

• Limitations on Environment and Installation Methods
  This YJV22 3×240+1×120 cable is suitable for direct burial, cable trench, and tunnel installation; it is not suitable for long-distance overhead tensioned installation or for vertical suspension installations subject to significant axial tensile loads. For applications requiring long-term submersion or deep-water installation, the YJV32 steel-wire armored cable should be used instead.

• Standardized Management of Storage, Transport, and Handling for Large Cable Drums
  Large cable drums should be stored in warehouses with level, dry, and well-ventilated flooring, avoiding prolonged exposure to rain or direct sunlight. During handling and long-distance transport, precautions must be taken to prevent severe impacts, crushing, or tipping of the drums; such incidents could cause cracking of the outer sheath or damage to the internal insulation structure, thereby compromising the cable's long-term insulation integrity and safety.

• Comprehensive Documentation Package Meeting All Specification Requirements
  All products are manufactured in strict accordance with GB/T 12706 and relevant IEC international standards. We provide a complete set of factory qualification certificates, comprehensive type test reports, third-party inspection reports, and editable technical data sheets free of charge. This ensures full compliance with global tender requirements regarding documentation review, submission approval, and project acceptance for this large-cross-section (3×240+1×120) cable specification.

• Rigorous Raw Material Selection and End-to-End Batch Quality Consistency Control
  For the production of large-cross-section cables, we utilize high-purity electrolytic copper rods (99.97% purity) and premium XLPE insulation materials. Core processes—such as stranding, insulation extrusion, armoring, and sheathing—are equipped with real-time online dimensional monitoring systems. These measures ensure stable conductor DC resistance, uniform insulation thickness, and consistent electrical performance across production batches, thereby minimizing the risk of rejection during incoming inspections for large-volume tender orders.

• Flexible, personalized customization tailored to specific project technical requirements
  Based on client technical drawings and project-specific needs, we offer customization services for YJV22 3×240+1×120 cables, including ZA/ZB/ZC flame-retardant modifications, upgrades to low-smoke zero-halogen (LSZH) outer sheaths, fixed-length cutting, large wooden or steel reel options, and specialized export packaging.

• Factory-direct model ensuring stable pricing and flexible order requirements
  We operate our own manufacturing facilities, eliminating intermediary markups; we support small-batch sample trials to meet preliminary project qualification testing needs and prioritize production for large-volume orders. We maintain ample finished-goods inventory for mainstream specifications like YJV22 3×240+1×120, enabling rapid shipment to meet urgent delivery demands for major engineering projects.

• Comprehensive, full-lifecycle technical support designed for heavy-duty backbone lines
  Our team of professional cable design engineers provides free services including load calculations, ampacity verification, comparative cost analysis of copper vs. aluminum solutions, installation route optimization advice, remote and on-site technical guidance, and systematic post-sales quality tracking. These services are backed by a formal, long-term product warranty policy, completely alleviating technical and quality concerns for procurement and engineering teams after orders are placed.

We possess extensive cross-border export experience in supplying materials for large-scale overseas infrastructure projects. We offer mature export packaging solutions, comprehensive customs documentation capabilities, and efficient, coordinated global logistics channels. We have a proven track record of reliable supply for major construction, municipal utility network upgrades, and new energy infrastructure projects across Southeast Asia, Central Asia, Africa, the Middle East, and Latin America. Furthermore, regarding the standard heavy-duty power cable specifications mentioned above, we are well-versed in the project inspection, acceptance, and compliance filing requirements of various overseas regional markets..